Huawei SmartAX-MT880v3 Router Manual PDF (Setup & Configuration Guide)

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51

I.

Configuration page

Figure 4-24

IP filter configuration

II.

Parameter explanation

z

Security Level:

This setting determines which IP Filter

rules take effect, based on the security level specified in

each rule. For example, when

High

is selected, only those

rules that are assigned a security value of

High

will be in

effect. The same is true for the

Medium

and

Low

settings.

When

None

is selected, IP Filtering is disabled.

z

Private/Public Default Action:

This setting specifies a

default action to be taken (Accept or Deny) on private or

public-type device interfaces when they receive packets

that

do not

match any of the filtering rules. You can specify

a different default action for each interface type. (You

specify an interface's type when you create the interface;

see 4.3.3

PPP Configuration, for example.)

A

public

interface typically connects to the Internet. PPP and

IPoA interfaces are typically public. Packets received on a public

interface are subject to the most restrictive set of firewall protections

defined in the software. Typically, the global setting for public

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52

interfaces is

Accept

, so that all accesses to your LAN initiated from

external computers are denied (discarded at the public interface),

except for those allowed by a specific IP Filter rule.

A private interface connects to your LAN, such as the Ethernet

interface. Packets received on a private interface are subject to a

less restrictive set of protections, because they originate within the

network. Typically, the global setting for private interfaces is

Accept

,

so that LAN computers have access to the Internet connection.

Ensure that the Security Level and Private/Public Default Action

settings on the IP Filter Configuration page are configured as needed,

and then click the

Submit

button. A page displays to confirm your

changes.

4.13.2

Adding an IP Filter Rule

To create the IP filter rule, and set the rule as it must be suit for

various standard while transfer the rule. To add new IP filter rule

using these commands:

On the main IP Filter page, click the

Add

button to display the IP

Filter Rule - Add page. Enter or select data for each field that applies

to your rule. The following figure describes the fields.

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53

I.

Configuration page

Figure 4-25

Add IP filter rule

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54

II.

Parameter explanation

z

Rule ID

: Each rule must be assigned a sequential ID

number. Rules are processed from lowest to highest on

each data packet, until a match is found. It is

recommended that you assign rule IDs in multiples of 5 or

10 (e.g., 10, 20, 30) so that you leave enough room

between them for inserting a new rule if necessary.

z

Action

: Specifying what the rule will do to a packet when

the packet matches the rule criteria. The action can be

Accept

(forward to destination) or

Deny

(discard the

packet).

z

Direction

: Specifying whether the rule should apply to data

packets that are incoming or outgoing on the selected

interface.

Incoming

refers to packets coming in to the LAN

on the interface, and

Outgoing

refers to packets going out

from the LAN. You can use rules that specify the incoming

direction to restrict external computers from accessing

your LAN.

z

Interface

: The interface on the device on which the rule will

take effect.

z

In Interface

: The interface from which packets must have

been forwarded to the interface specified in the previous

selection. This option is valid only on rules defined for the

outgoing direction.

z

Log Option

: When

Enabled

is selected, a log entry will be

created on the system each time this rule is invoked. The

log entry will include the time of the violation, the source

address of the computer responsible for the violation, the

destination IP address, the protocol being used, the source

and destination ports, and the number of violations

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55

occurring in the previous

x

minutes. (Logging may be

helpful when troubleshooting.) This information can also be

e-mailed to administrators.

z

Security Level:

The security level that must be enabled

globally for this rule to take affect. A rule will be active only

if its security level is the same as the globally configured

setting (shown on the main IP Filter page). For example, if

the rule is set to

Medium

and the global firewall level is set

to

Medium

, then the rule will be active; but if the global

firewall level is set to

High

or

Low

, then the rule will be

inactive.

z

Black List Status

: Specifies whether or not a violation of

this rule will result in the offending computer's IP address

being added to the Black List, which blocks the MT800

from forwarding packets from that source for a specified

period of time.

z

Log Tag:

A description of up to 16 characters to be

recorded in the log in the event that a packet violates this

rule. Be sure to set the Log Option to

Enable

if you

configure a Log Tag.

z

Start/End Time:

The time range during which this rule is to

be in effect, specified in military units.

z

Src IP Address

: IP address criteria for the source

computer(s) from which the packet originates. In the

drop-down list, you can configure the rule to be invoked on

packets containing:

z

any

: any source IP address.

z

lt

: any source IP address that is numerically less than

the specified address.

z

lteq

: any source IP address that is numerically less

than or equal to the specified address.

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